Introduce TabGroup sharing

This CL adds an item in TabGridDialog toolbar menu to expose tab group
sharing. The group is shared as plain text which is in the format of
a list of URLs of all tabs in the group.

Bug: 1017492
Change-Id: I65c89f56bbd4f6135501958e5a925c5bbc6c2ac0
Commit-Queue: Yue Zhang <>
Reviewed-by: Theresa  <>
Reviewed-by: Peter Wen <>
Reviewed-by: Yusuf Ozuysal <>
Reviewed-by: Wei-Yin Chen (陳威尹) <>
Cr-Commit-Position: refs/heads/master@{#734750}
11 files changed